Automatic elevator control



Sept. 22, 1953 J. H. BORDEN ET AL 5 AUTOMATIC ELEVATOR CONTROL Filed Oct. 1 1951 UP PEAK Hem powu oowu PEAK nuns ICAR- uuuasn TERMINAL TIMING MEANS TERMINAL IMMEDIATE LOWER TERMNAL TOP OF TRAVEL HIGHEST CALL CAR ZONING MEANS OVERTIME' WAIT mem- SIGNAL Muss UNATTENDED OPERATDN Ihwentorz! JOSEPH H. Bonosn WALTER A. 'NIK-AZY attorney:

Patented Sept. 22, 1953 UNITED STATES PATENT OFFICE AUTOMATIC ELEVATOR CONTROL Joseph H. Borden and Walter A. Nikazy, Toledo, Ohio, assignors to Haughton Elevator Company, Toledo, Ohio, a corporation of Ohio Application October 18, 1951, Serial No. 251,848 22 Claims. (01. 187-29) This invention relates to elevator controls and again and be available for bringing down addiparticularly to supervisory control systems in tional loads, thereby utilizing the time which in which control devices are so organized that varthe absence of Heavy Down trafiic would be ious groups of such devices can be caused to spent during loading intervals at the lower cooperate to automatically dispatch and reverse terminal. the cars of a bank of elevators and to auto- If the starter should observe or expect Heavy matically signal their attendants and persons Up trafiic, he can switch in another group of wishing to use them in such manner as to utilize circuits, including one which causes immediate the elevators most economically and for the best patch f om the upp r t m nal a d anaccommodation of traflic. The invention is apother which restores scheduled timing from the plicable to freight elevators as well as to passen- 1 Wer terminal. ger elevators, Upon the occurrence of an extreme Up Peak A program of operation for a bank of ele- 0f traffic, the starter can switch in Still another vators which would be most appropriate for group of circuits, including one which signals their operation under conditions that are normal h ear to reverse t t h est floor for which throughout most of the hours of an ordinary that has freight a Passenger, from business day would be quite inappropriate for Which that car has received a signal from a perthe operation of the bank of elevators during 5011 desiring to descend 1 to d Something the morning and evening rush hours, and a dOWh- Under the Program s t up cars go program suitable for operation of the bank of 29 t0 the upper terminal y W n th y have elevators during noontime activity would differ passengers r t ms for that terminal or when t only {mm th morning and evening rush they receive signals from that terminal. hour programs t also from t t appropriate Upon the occurence of an extreme Down Peak for operation under normal conditions. f trahie, as for example during the e g Elevator engineers have worked t 5 rush, the starter can switch in a further group binations of circuits, signals, relays, and other f c cui s, One of which limits the travel Of cerelements which can be hooked together by means tem of the ears to the l r ne of floors, which of switches under the manual control of an ele- Otherwise might be ivy-passed by most of the devator starter to cause the bank of elevators to Scehdmg Cars because y had been filled at operate in accordance with such traffic condi- 30 Pe fieers- Under this p am all cars artions as seem t t elevator starter to be prev riving at the lower terminal and all cars arriving alent at the time. The conditions and the reat the upper terminal l b d patched imspsctive control programs that have been mediately, and the cars serving the lower zone vided for them are referred to hereinafter as floors each will be signaled to e se at the Peak, Balanced, Heavy Down, Heavy highest floor from which it has received a call. Up "Down p and Night Servicey In all cases the starter can interrupt the pro- When there is no rush of ingress or egress the gram that he thus has Set up r automatic elevator starter can switch in circuits which will operatioh- In addition to Setting up y of the cause the cars to leave the lower terminal and five programs mentioned above, the ter can the uper terminal at such intervals as to avoid cause bank to Operate With one Or more elecollection of waiting cars either at the lower Vators ldle- He also can Set up a Sixth p ogram. terminal or the upper terminal, thus insuring with only one elevator n S rvice; in reasonably prompt service at an fl r At the which the elevator remains at the lower terminal same time he can switch in circuits which cause except h f is called upon to go to an pp r signals in the lobby to indicate to passengers h T 5 13 known as Night Service In which car is being loaded and circuits which Pfilce bulldmes it usually is SWltched n for servautomatically provide compensation for delay we at hlght on Sundays and h days.

which may occur during the cycle of operation Apparatus containing Venous Circuits, Si nals.

. of any of the cars. This is the condition called relays and other elements Which may be selec- B tively switched together to meet conditions that when the Starter observes or expects Heavy arise in elevator operation are well known in Down traffic, he can switch in a different group the Such apparatus l unction satisof circuits including one which dispatches cars factorhy however only at the hands of inte11i arriving at the lower terminal immediately so gent and experienced and alert p visors who that as soon as they are emptied they can go up not only know What to do to meet ve y condi- 3 tion but who can and will perceive when to switch from program to program.

It is an object of this invention to provide a system of controls which will automatically initiate an appropriate program of operations for a bank of elevators and will successively automatically switch to other appropriate programs at intervals predetermined by experience and knowledge of the habits or routine practices of persons who customarily use the particular bank of ele-t vators to which the program are applied.

Other objects and advantages'will be apparent from the following description illustrated by the accompanying drawing which is a diagram of circuits and other means cciistituting'a tion'l bination of apparatus embodying the instant invention, the apparatus being'conditioned for Up Peak Traflic.

Following are definitions of terms hereinafter tused to-designate=sub+combinations of circuits andielements-whichare severally :wellknown to those skilled'i'n theart:

'--'L0wer: terminals non -sequence wdispatching means.-A circuit which can be switched into-the "control: system for a" bank of elevators, to cause 1 cars attheterminals. of a "bank of elevators to receive signals to leave the ter'minalsg s'uch. sig- -nals beingreceived by the cars in the order of theirarrival's at the terminal so thatif more' than one car is standing at the terminal the signal to leave 'ordinarily will be received by'th'e car that 1 LWasfirst to arrive;

"The signal usually'is alight which fiashesbefor'e :the eyes of the elevator att'endant: The circuit 6 also successively illuminates light-fixtures above 'the entrances to-the nears next to be dispatchedi' Such =a circuit is -shown and described in 'U.' S. Patent No; 1,966,071

' 1 datedJul'y 10,1934.

1 Car-number balancing means.'-A' circuit which 1 can be switched-into the ccntrol 'system for a bank of-elevators: be given simultaneously to a car-standing at the lo' w'er terminal and -a car stahding s t-the upper terminal when an even number isuch as 1 two, four, or: six) I or cars in the bank ofelevators 'are P v in servicey and 'ca'n' be altered to cause' dispatch =:sig nals to bei'given alternately to -cars standmg 1 at -the lower-and-lupperterminals when arr-odd bank of':elevators are in ser 'v-icei A manually alterab le' circuit or th-is -kind issh'own- I and describeddn U. SmPate'nt No. 966,011 dated-July- 10,

Lower terminalascheduletiming-meansP-A circuit wvhic h can be' -switch'ed into 'the control sysl' 'teni for a bank o'f clevato'rs -to'-connect atiming de vi'ce to the' mean's for-non sequen'cedispatch- =::.ing, to cause the d-ispatch signals to be'given at enregul'alr intervals to cars standing at the lower terminall l'he timing=device-usually is so constructed that the -length of. the intervals can be .circuit 'which 'can Uppei ter'minal schedule timing "meansr-A be switched' into' the control system for a bank 'cr elevators to connect tim- '-1..in'g device to tlie means m lion-sequence dispatchin'g', t'o cause' the dispatch -signals to 'be -given 'at regular intervals tocars standing at'the upper terminal. The timing device-usually is so con- A circuit which can be switched into a control 4 system for a bank of elevators, to cause dispatch signals to be given to cars immediately upon their arrival at the lower terminal even though the cars at the upper terminal are being dispatched on schedule timing. Such a circuit is shown and described in U. S. Patent No. 1,966,071 dated signal to be given each car upon its arrival at the'top oi." its"travel cycle whether the top of its travercycle beethe upper terminal or an interw mediate' floorbuiSuch a circuit is shown and described in U. Si Patent No. 2,074,575 dated March 23, 937.

' Highestcall operation means-A circuit which ,raxcan be switched into a control system for a bank of elevators, to cause a signal to reverse to be given to each .caruwhenever.thaticar makesa stop at the highest flcorforwhich thatlc'anhasapassenger or iromwhich-that car.hasialcallv such a circuitis sh'ownand-described in U. S. Patent No. 2,074,575-dated March 23,1937.

Car zoning.-Imeans..-A.. circuit lwhich... can. be switched into-a controlsystem for a bank of elevators, to cause certain ot the cars inuthewbank of elevators to receive ,s gnals to reverse-when in their upward travel they havereacheda predetermined. immediateyfloon- -Such ao ci cuit is shown and described in U. S. PatentNo, 21 1 dated September 17-,14940.

Overtime-wait. signal means. -A circuitw-hich can be switched into acontrol system for-.a-bank of elevators, to cause a signal to appear atthe elevator starters panel-whenevera down'call-has been given by a passenger. waiting one. certain floor and thedescending car doesnotstop atthat floor within a reasonable-period c. g., 60 seconds.

to cause dispatch signals to Such a circuit isshown'and described inrU.2s'. Patent No.- 2,103,123 dated December 21,-: l93Fi and U Sa Patent vl Io.-2,-l48,9.1-3'datedlFz-rbruany 28;:1939.

Night: signal -means:-Acircuit .which--. can be i switched. into a control: system for a=bank of elevators, to cause a. signaL-eaudible wherever: a-car 1n: service imay be, to be given-whenevervaacall button ispresse'd onwanyrfioort: A common-annunciator circuit Y may be c employed. 1 Thei'night signal means usual-lyvis switched in WhGIIMOIllYrOIlG "car is in service as: isthe-case -insofiicesbuildings at. night and on Sundays and holidays.

Unattended: operationtmeansa-Awcircuit.which causesthe car touwhich itis applied to :"perform as anautomaticelevator-withthehcme station eadjusted;- 'Such 'a circuitis shown-and described at the lower terminal at everystrip; :esucha circuit is ShOWH flIld"; described in U. :8. Patent No. 1,984,308,dated December 11,i1934.

Since :the----- means.- defined. in r: the :twpreceding paragraphs-care severally well: known in 'rthl art and are described in 'priorpatent's; and sin'ce the instant invention :is nowise dependent supomrthe details of suc'h means, andvsince. elaborate-swiring diagrams would he -required to v illusti."atez uch means in detail; T-they care -i shown in; theeaccempanying drawing by conventionalblock diagramming. In thesdrawingethe terms byiwhichcthe above defined means-are designated =in-:this-'.specificationi are inscribed upon respectivewblocksithat represent them.

In the: drawingvthewrelays and contacts -mhich cooperateto close a circuit torimplementingeach parti'cular-prog-ram are shown-connected to a bar which is =1abeledwith-the rterm designating the condition forrwhich=that1particular-lumen: is appropriate.

It has been found by repeated observation that during each season of the year, the collective habits or routine practices of the persons who customarily use each bank of elevators concerning which observations were made fall into a daily pattern and that phases of such patterns shift in the same manner during every day from Monday through Friday, the shifts occurring at certain times of the day. For a typical oflice building bank of elevators, during the season extending from Labor Day to Christmas, the daily pattern may be as follows:

Night Service or Unattended Operation The instant inventors have found it feasible, after ascertaining the daily or weekly pattern of traffic carried by the bank of elevators, to organize the supervisory control system of the bank of elevators so that programs of operation suitable for the varying traflic conditions will be initiated automatically at the times of day or week that they should come into operation, each program being maintained until the initiation of the subsequent program.

The supervisory control system can be organized to operate with cycles of any desired length, such as twenty-four hours or seven days. For twenty-four hour cycle operation a twenty-four hour timing device is incorporated in the system. For seven day cycle operation a seven day timing device is employed. Various type of twenty-four hour cycle and seven day cycle timing devices which may be incorporated in the apparatus of the instant invention are commercially available.

Since the structures of timing devices per se are not features of the instant invention, a simple timing device capable of closing switches at predetermined intervals to initiate successive programs is shown somewhat diagrammatically in the drawing. The form thus shown is chosen for the sake of simplicity of diagram and description, but the choice does not indicate any preference for incorporation in actual installations. The timing device in this form has a dial I having twenty-four hourly markings from one oclock a. m. to noon and from one oclock p. m. to midnight.

Mounted for circumferential adjustment on a track 2 encircling the dial I are switches 3, 4, 5, 6, I, 8 and 9, one switch 3 being located at the seven forty-five oclock a. in. position, another switch 4 being located at the nine fifteen o'clock a. m. position, another switch 5 being located at the eleven thirty oclock a. m. position, another switch 6 being located at the twelve thirty oclock sition and still another switch 9 being located at the two oclock p. in. position, another switch 8 being located at the four thirty oclock p. m. position and still another swtich 9 being located at the five forty-five oclock p. m. position. Each of the switches may be adjusted along the track 2 to other positions. An arm I is moved by clock work (not shown) over the dial I in a clockwise direction making one complete circuit each twenty-four hours, and closing the switches 3, 4, 5, 6, I, 8 and 9 in succession asit reaches them.

In a like timing device operating on a seven,

day cycle the arm would be moved by clock work to make one complete circuit in seven days and the sequence of switches would be repeated for certain days, e. g., from Monday through Friday, with different sequences for other days, e. g., Saturday and Sunday.

The closing of the switches 3, 4, 5, 6, 1, 8 and 9 is transitory. Upon reference to the drawing it will be seen that closing the switch 3 which is located at the seven forty-five oclock a. m. position on the dial I closes a circuit through the coil of a relay II, thus completing a circuit through closed switches I2, I3, I4, I5 and I6. The circuit thus completed keeps the coil of therelay II energized as long as all the switches I2,

I3, It, I5 and I6 remain closed even though the transitorily closed switch 3 opens.

Activating the relay II closes contacts I'I, I9,

29 and 2| which, as indicated by the bar labeled Up Peak, are connected to move with the relay" I I thus switching into the supervisory control system the Lower Terminal Non-Sequence Dispatching Means, the Lower Terminal Schedule: Timing Means, the Immediate Top of Travel. Dispatching Means and the Highest Call Op-- eration Means for setting up the Up Peak pro-- gram.

the Up Peak program remains in effect until one of the switches I2, I 6 is opened to de-energize the coil of the relay II. This occurs when the arm Ill reaches and transitorily closes the next switch 4 which is mounted on the track 2. Closing of When the coil of the relay II is tie-energized by the opening of the contact I 2, the relay II acts to open the contacts II, I9, 20 and 2| that were closed when the coil of the relay I I was energized. Opening of the switches 20 and 2| cuts out the Immediate Top of Travel Dispatching Means and the Highest Call Operation Means. The Lower Terminal Non-Sequence Dispatching Means and the Lower Terminal Schedule Timing Means are kept in the system by the closing of two contacts 23 and 24 which operate in connection with the relay 22 that was activated by the transitory closing of the switch 4. The Automatic Car-Number Balancing Means is brought into the system by the closing of a contact 26, which contact 26 also is connected with the relay 22 as indicated by the bar labeled Balance. In this manner the Up Peak program is terminated and the balance program is initiated when the arm I 0 reaches the switch 4 in its adjustedposition on the track 2.

The supervisory control system operates in accordance with the Balance program until the coil of the relay 22 is ole-energized. It is to be noted that the contact 21 was closed upon deactivation of the relay II. Closin the switch 5 energizes the coil of the relay 2% which is shown by the bar labeled Heavy Down to be connected to the contact 28. Opening of the contact" 28 de-energizes the coil of the relay 22 thus opening the contacts 23, 26 and 24. The opening of these three contacts has the effect of switching out of the supervisory control system the Lower Terminal Non-Sequence Dispatching Means," the Car-Number Balancing Means and the Lower Terminal Schedule Timing Means. The "Lower Terminal Non-Sequence Dispatching Means howev ei is kept in;the system by the i dosing of. theicontact. 3W c contact 3 l"bringsethe::Uppern'rerminala Schedule iming':MeanstJinto th'e: systemoandxclosing of itheicontact 32 :hrings in. the "lmmediateahower Terminal Dispatching :Meansf-ar In thisvma-nner the Balance program iszrtemminated:;and:':'=the :1; :Heavy Downprogram iszputiintoaefiect.

2- lh'e".HeavyiDown'iprogrami is terminated when if. theiarm lflzreaohes the'zswitch i invite-adjusted position .onz the-u track 23 rTransitoryz closing of he switoh 6? activateswaxelaiy v3 3 thus opening the 4 previously :mentionedi switch I 4 which as'ris shown we b y the' adiagram carries-the current that-energizes the1.coii orrtheiirelayr zsli De'activation of therelay N by npeninga theswitch 4:4 :causes the r -switches 30;? 3xlraanxli M to openi"? The *=U-pper Terminal Schedule-: filming i Meansflo and the ii i ".Immediate'showerzTerminal fiispatchirrg Means eaiieithcrebyiswitchedtout of: thetsupervisory :conr trot a system. 1 Iheihowem'1 er'minal' Non sequenceaDisp atchring -Means"is' iretained in the system by: the closin'gof a switch MZWhichas is shown bythe bar labeled fleavy 'Uppi's closed'uponactivatioh ot-the erel'aiy 33Lfl-Activation ot-the relay also closeacona .tac't's 3&1 and 310 which: closings bring: into the supervisory control system the Lower Terminal tschedul'e' Timing Means" :and 1 the lmrnediate Tom oii'flTravel Dispatching "MeansF In this manner the Heavy Up program: is *put into effect"; when the arm *lfl reaches the'switch '1 in its adjusted position onithe track-ithe relay Hence o again -is energized to close the contact's 23; 26 and: Hnand -the-relay 33 is de=energized by-the openingmficontact 51 of :therel'ay 22 to open the. contacts 3 4; 3B and 37; The heavy Upprogram thus is disc'ontinued by 'switching out-the Lower 'Terminar Schedule Timing 1 Means, and the immediate Topof Travel =--Dis-p'atching Means and the'Balance programis restored by switching in the" Car-Number Balancing Means? and the 1 -Lowr =Tenninal' schedule l'iming Means? :the ="Lowe'r Terminal Non-Sequence Dispatching Means being. retained.

" When the arm I0= -reaches-to switch 8 in its.

adjusted' position on 'the .track2= the-relay: 38 is activated thus 'opening the contact ;:anld de- *activatingthe relay 22} "De'activation ot the reiay 22 switches out ofthe supervisory control system in the manner ---Lowe'r' Terminal Non-Sequence Dispatching 1 Means, th'e Car-Number Balancing a Means and the Lower Terminal ScheduIe rsTiming Means. Activation 'ofthe relay 38 closescoon- -tacts- 39, 40, A! no 43; The closing of'zthese 55 contacts brings 1 into *the 1 supervisory:control; system Immediate: Lower Terminal! Dispatching Means, the Imm'ediateTop of-flravel "Dispatch- Overtime-Wait 1 Signal Means?! :The: Balance program thus issuspended and the Down-Peak program is'inaugurated to remain: intoseffect until-thearm l0 reachestheswitch 9.

Closing of the switch .9 "activates'ayrelay; M which by opening a contact 5zdeactivatesxthe relay 38 thus taking-outer thewsupervisoryicontrol system the Immediate Lower J Tenninal z-Dispatching Means? the Immediate1i'I-op of Travel DispatchinQ'Means," the r Car @Zonin'gs Means,

and the Overtime-Wait SignalaMeans" all of.

l which have -been functioningduring-the Down Peakprogramt :Activation of the relay also closes a contact 45 which brings-into the supervisorycontrol' syste'm the Highest Call Operation """Means-"-and a contact 41. whiclrbrings -into the.

whilessclosin'g ofl'rthe hereinbeiore explained the service" either the Night BignahMeans or the -Unattended- Operation Means thus :putting the Night Service program into effect.

Whethenthe Night Signal: Means" or the 's Unattended Operating Means is broughtinto -serviceby activation of the relay Mwdependsupon the condition ofothe manually operated switches and 49: I-f the switch lfl .i's closedmand the witch 48 -is-openthe NighhSignal Means is lo switchedin! lfthex 'switch 49 is closed and-the t switch" 48 is open the Unattended =-Operation Means is switched in. The switehes" 48 and 49 .;'...-are .operated by a commontfmger apiecegwhich .wcloses: one as it opensrtheuothenso;that; both 1-5 are .nothclosed at the. same: time.

-,:I-hecontacts shownimthedrawing which-have Minot-heretofore been .ment-ioned viz. numbers r.-; 25,;;,50, 5|, 52, 53, 5.4, 55; 56 and 51, serve to prevent circuits througheoils oftwo orcmore of 38. and from being closed at the same time. With a system ofcontrols orga i cc to --the instant invention; as above ;--described, neither the composition of the programs nor the 25 ti1nes at-which they areinitiatednor'the periods --*-icr-' which they areiefliective is :dependent upon ----the,-experienc e, judgment and-alertness of the marter. *Thestarter-need have no knowledge of ---the control apparatus; -,He can-devote his atten- 30 "tionto' the instructionand-supervision of car attendants, to guiding patrons andjanswering'quesv:'tions'."- The supervisory-control 'systemof the instantinvention functions with timely shifts from program-to prograrnevenwhen the starters at- 35 -tentionis diverted or wanders and even though he be absent.

Deflnitionsofthevarious means recitedin the sub-joined' -claims'yare given in the foregoing ----speeificationi-* -Thecl aims are intended to encompass all mcdiflcations and variations within the spirit-and scope of-the-definitions and thejspirit and scope of the claims. *Having describe'd the invention 1 we claim:

-1; Asystem-of controls for abank of elevators comprising, incombinaticn, lower terminaL nonsequencedispatching: means, lower, terminal scheduletiming-means, immediate top of travel dispatching means;;highest call operation. means, means forswitohing together said lowerterm'inal -non sequencedispatching means, said. lower ter- 'minalscheduletimingmeans, said immediate top of travel dispatching; means and ,said; highest ball-:operation means" and thereby conditioning r --thesystemtoopcrate'according to a prograin appropriate for Up Peak traffic and means for causing said mean's -for switching to. operate" at a predetermined time. I "2'. combination such'as, isflclefine'gl in claim 1 -mwhich the means for causing said .means for -=swrtching topperate at a predetermined time is adjustableto setsuch predetermined time.

-3.-A -s ystem of-controls for a bank of elevators M mnprwins, in, combin tion. lowcn term aLnonseqnence dispatching means, car -I1juzr1l: w a rv bal- -anc1ng--rneans, lower terminal schedule timing means, means for switching' together said lower terminalrnon-sequence dispatching means, said car-number balancing meansand said lower ter- 'ina lschedule-3 timing means and thereby can- I itioningthe'system to operate accordingtto a programsuitable-for Balanced traffic, and means for causing said-means for switching to operate at predetermined times. 7 =4.-Aoombination-such'as isfldefined in claim 3 7 *-1n whioh the means for-causing said means for switching to operate at predetermined times of the day are adjustable to set each such predetermined time.

5. A system of controls for a bank of elevators comprising, in combination, lower terminal nonsequence dispatching means, upper terminal schedule time means, immediate lower terminal dispatching means, means for switching together said lower terminal non-sequence dispatching means, said upper terminal schedule timing means, and said immediate lower terminal dispatching means and thereby conditioning the system to operate according to a program appropriate for Heavy Down trafiic, and means for causing said means for switching to operate at a predetermined time.

6. A combination such as is defined in claim in which the means for causing said ,means for switching to operate at a predetermined time is adjustable to set such predetermined time.

7. A system of controls for a bank of elevators comprising, in combination, lower terminal nonsequence dispatching means, lower terminal schedule timing means, immediate top of travel dispatching means, means for switching together said lower terminal non-sequence dispatching means, said lower terminal schedule timing means and said immediate top of travel dispatching means and thereby conditioning the system to operate according to a program appropriate for Heavy Up traflic, and means for causing said means for switching to operate at a predetermined time.

8. A combination such as is defined in claim 7 in which the means for causingsaid means for switching to operate at a predetermined time is adjustable to set such predetermined time.

9. A system of controls for a bank of elevators comprising, in combination, immediate lower terminal dispatching means, immediate top of travel dispatching means, car zoning means, overtimewait signal means, means for switching together said immediate lower terminal dispatching means, said immediate top of travel dispatching means, said car zoning means, and said overtime-wait signal means and thereby conditioning the system to operate according to a program appropriate for Down Peak traffic, and means for causing said means for switching to operate at a predetermined time.

10. A combination such as is defined in claim 9 in which the means for causing said meansfor switching to operate at a predetermined time is adjustable to set such predetermined time.

11. A system of controls for a bank of elevators comprising, incombination, highest call operation means, night signal means, means for switching in said highest call operation means and said night signalmeans, and means for causing said means for switching in to operate at a predetermined time.

12. A system of controls fora bank of elevators comprising, in combination, unattended operation means, means for switching in said unattended operation means and means for causing said means for switching in to operate at a predetermined time.

13. A system of controls for a bank of elevators comprising, in combination, lower terminal non-sequence dispatching means; car-number balancing means, lower terminal schedule timing means, immediate top of travel dispatching means, highest call operation means, means for switching together said lower terminal non-sequence dispatching means, said lower terminal 10 schedule timing means, said immediate top of travel dispatching means, said highest call operation means, and thereby conditioning the system to operate according to a program appropriate for Up Peak traflic, means for switching together said lower terminal non-sequence dispatching means, said car-number balancing means and said lower terminal schedule timing means and thereby conditioning the system to operate according to a program appropriate for Balance trafiic, means for deconditioning the system for operating according to a program previously in effect whenever the system is conditioned for operating according to a newly initiated program, and means for causing each of said means for switching to operate at a predetermined time.

14. A combination such as is defined in claim 13 in which the means for causing said means for switching to operate at a predetermined time of the day are adjustable to set each such predetermined time.

15. A system of controls for a bank of elevators comprising, in combination, lower terminal non-sequence dispatching means, car-number balancing means, lower terminal schedule timing means, upper terminal schedule timing means, immediate lower terminal dispatching means, immediate top of travel dispatching means, highest call operation means, means for switching together said lower terminal non-sequence dis patching means, said lower terminal schedule timing means, said immediate top of travel dispatching means, said highest call operation means and thereby conditioning the system to operate according to a program appropriate for Up Peak traific, means for switching together said lower terminal non-sequence dispatching means, said car-number balancing means and said lower terminal schedule timing means and thereby conditioning the system to operate according to a program appropriate for Balance traflic, means for switching together said lower terminal nonsequence dispatching means, said upper terminal schedule timing means and said immediate lower terminal dispatching means, and thereby conditioning the system to operate according to a program appropriate for Heavy Down trafiic, means for deconditioning the system for operating according to a program previously in efiect whenever the system is conditioned for operating according to a newly initiated program, and means for causing each of said means for switching to operate at a predetermined time.

16. A combination such as is defined in claim 15 in which the means for causing each of said means for switching to operate at a predetermined time of the day are adjustable to set each such predetermined time.

17. A system of controls for a bank of elevators comprising, in combination, lower terminal non-sequence dispatching means, car-number balancing means, lower terminal schedule timing means, upper terminal schedule timing means, immediate lower terminal dispatching means, immediate top of travel dispatching means, highest call operation means, means for switching to gether said lower terminal non-sequence dispatching means, said lower terminal schedule timing means, said immediate top oftravel dispatching means, and said highest call operation means and therebyconditioning thesystem to operate according to a program appropriate for Up Peak trafiic, means for switching together said lower terminal non-sequence dispatch means, said car-number balancing means and said lower terminal. scheduletiming means and. thereby a programsuitable forBal'ance traflic,'means. for

terminal .non-seswitching. together .said lower. quence. dispatching means, said. upper terminal schedule timing means ands'a'id immediate lower terminal dispatchingnmeans and thereby c,ondi-. tioningthe system to operateaccording to a program appropriate for Heavy Down traflic,.means forswitching together said. lower terminal nonsequence dispatching means,.said lower terminal schedule timing meansandsaid immediate top of travel dispatching means and. thereby conditioning the system to operate according to a programappropriate for Heavy Up trafiic, means for deconditioning the system for .operating ac cording. to a program previouslyin effect when-. ever the system is cording to a newly, initiated program, and means for causing each of said means for "switching to operate at a predetermined time.

18. vA combination suchas is. defined. in claim 17 in which thejmeans fori'causing eachof said means for switchingto operate at a predetermined time .is adjustable to set each said prede-J termined. time.

19. A system of controls torfa bank of elevators conditioned for operating accomprising, in combination, lower. terminal nonsequence dispatching means, car-number balancing means, lower terminal schedule timing means, upper terminalschedule timing-means, immediate lower terminal dispatching. means, immediate top of travel dispatching. means. highest .call opera-t tionmeans, car zoning means,,overtime-wait sige nalmeansnneans forswitchingj together said lower terminal non-sequence. dispatching means, said lower terminal schedule timingmeans, said immediate top of travel dispatchingmeans, and said highest call operation means and thereby conditioning the system to operate according to a program appropriate for UpiPeak traifici'means for switching together said lower terminal non-sequence dispatching means, said car-number balancing means and said lowerterminal schedule timing means and thereby conditioning the sys,

tem to operate. according to a program appropriate for Balance trafiicjmeans ioriswitching to gether said lower terminal non-sequence dis-.

patching means, said upper terminal schedule...

timing means, said immediatelower terminal dis-..

patching means and thereby conditioning. the system to operate according'to, alprogram .appro-.

priate for Heavy Down traffic,fmeans .for switch: ing together. said lower terminalsnon se uence dispatchingmeans, said lower terminal schedule timing means and said vimmediatewtopoi travel dispatching meansand therebyiconditioning the i system to operate accordingto a.program-appropriate forHeavy Up trafiic,1meansforswitchingv together said immediatelower terminal dispatching means, said immediate .top of traveldispatchmg means, said car zoning means, andsaid vove1'-- A time-wait signal means .and.;thereby.-conditioning the system to. operate accordingto a program appropriate for Down Peak trafiic, means for deconditioning the system for, operating according to a program previously in effectwhenever the system is conditioned for operating according to a newly'initiated program,tandvmeans for causing each of said means for switching to operate at a predetermined time.

20. A combination such as is defined in claim- 19 in which the. .means 10:... causing, each of said means for. switching ,to operateata predetermined time is adjustable'to set eachsnch 'pre-.. a

determined time r 21. .A system .of controls comprising, in combination, lower terminal nonsequence dispatchingzmeans, carrnumber balance. ing means, lower terminal schedule timing means, immediate lower terminal dispatching means, im-

mediate top of travel dispatching. means, car zoning means, overtime-wait. signal means, means for.

switching together. lower terminal non-sequence dispatching means, saidlower terminal schedule timing means, said immediatetop of travel dispatching means, andtsaid highest .call operation.

means and "thereby conditioning the. system to operate accordingto a programlappropriate for Up Peak traflic, means forswitching together said conditioning .the systemto operate according to a program appropriate for Down Peak traffic,

means for deconditloning the system for operating according to a program previously in effect whenever the system is' conditioned for operating according to a newly initiated program, and

means for causingeach of said means forswitching to operatetat a predetermined time.

22. A system of c"ontrols.for a bank of ele-m vators comprising, in combination, lower terminal non-sequence dispatching means, car-number balancing means, loweriterminaltschedule timing means, upper terminal schedule timing means, immediate lower terminal dispatching means, immediate top of traveldispatching means, highest call operationme'ans, means for switching together said 'lower"'terminal non-sequence dispatching means, said lower Lterminal schedule timing means and saidtimmediate top of travel dispatching means and thereby conditioning the system-to operate according to a program appropriate for Heavy Uptrafilcjmeans for switching together said lower "terminalnon-sequence dispatching means, said car-number balancing means and said lower terminal'schedule timing means and thereby conditioning the system to operate accordingt'o aiprogram' suitable for-Bal J ance traffic, means"forswitching"together said lower terminal non-sequence dispatching means, said upper terminal schedule'tlmin'gmeans and W said immediate lowerterminal"dispatching means and thereby conditioning the system to operate according to a programappropriate'for'Heavy Down traffic, means fordeconditioning the systerm for operating according to a'program previously in effect*wherieverthdsystein is conditioned foroperating'accordlng to a newly initiate'd program, and mansiof'causlng each of said-meansiorswitching to operate at a pre.- determined time.

JOSEPH BORDENL WALTER A. NIK-AZY.

Noreferences felted; .11...

foria bank of elevators 

